They're pretty much all cowards.
They know better than to bring most of their garbage to the floor by itself for a vote, so they bury it deep within a massive bill like this to keep it from being seen by the people who elected them. Both sides are guilty as hell of doing it, and it's a travesty. Rider bills and other stealth legislation should be outlawed. If they don't have the nerve to bring it to the floor on its own merits, then it shouldn't be brought up at all.
All in favor say Yea, all opposed say Nea.